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下列例子能在PH=13的水溶液中大量共存的是（ ）A.SO4 CL NA H B.K SO4 CU NO3C.CL K SO4 NA D.CA CL CO3 NA求教 Do not start a book unless you can see from the first few pages that it is ________you can easily read and understand .A.that Bone Cthe one Dwhich 小丽同学发现很多物质都能溶解在水中,但它们溶解速度有快有慢,那么影响溶解速率的因素有哪些?请你根据生活经验以冰糖为例提出你的猜想,并选择其中一种影响因素设计实验方案.（1） 你 BEC报名的时候要带些什么,要照片吗 我能报考BEC高级吗我的英语六级考了528分不知道这个成绩报考明年5月份的BEC通过的几率大不大. 请问BEC报名需要带什么 可以直接报考BEC高级吗? The quietness of the Reference Room in tje unversity library was broken only by an occadional coughand then by the hardly audible sound of pages_______.A.to be turned B.to have been turned C.being turned D.having been turned 报考BEC高级想直接报考11月份BEC高级,中级未通过.希望能得到点有用的建议.（不要告诉我没通过中级就没法通过高级之类的话,很多朋友都是直接通过高级了,可是六级分儿也才过线.） Although the first part of the book is easy ,the rest ____谢谢了,大神帮忙啊A has proved difficult 为什么选A这个选项难道没有问题么 为什么不是has been proved to be difficult although the first part is easy ,the rest are difficult是什么意思 The first part was easy; the second,however,took hours to finish.中文意思The first part was easy; the second,however,took hours ___ .A.to be finished B.to finish C.finishing D.finish bec一定要去考点报名吗 要带什么证件 BEC怎么报名啊?截止日期是什么时候?需要带什么证件?是必须要本人去报名么? 湖北2010年BEC报名需要哪些证件急切想要知道报名所需要带的证件,因为我不是武汉的,向知道可不可以让武汉的同学代我报名,还是一定要亲自去吗? 英语翻译确定么? “麦阁”在闽南语里面是什么意思?拜托了各位 谢谢 （全世界都是你的,你是我的.）这一句英文怎么说 足字旁边有个半字怎么 读 We can't always wait for the right time to do anything. wo visitied Beijing and Shanghai ____(when /while/ as/ during) our stay in China. We were all cheerful because we had p__ weather during our stay in Shenzhen. during we stay...为什么我看到的都是用during our stay?而不用“we”呢? 物理书初中有什么版本? 成都用的是什么版本的物理书 北大物理学系的物理课本是什么版本的?叫什么名字?什么出版社的? (邕)括号里的字读什么音 两个不同的字读一个音,叫什么音啊? Some volunteers from Beijing arrived in Shanghai______April 29 to work for the world Expo.A.on B.at C.of D.to应该选什么?大家可不可以说一下这些词的区别 you had a good time in the SHanghai Expo site,______you?A.hadn'tB.didn'tC.don'tD.won't 请问浮地电源用英语怎么说/ Do the Right Thing-Always是什么意思?